How severe is CVE-1999-0809?

CVE-1999-0809 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-1999-0809 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0809?

CVE-1999-0809 affects Netscape Communicator. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-1999-0809?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-1999-0809 published?

CVE-1999-0809 was published on 1999-07-09 and last updated on 2026-06-16.

CVE-1999-0809

CVE-1999-0809 is a medium-severity vulnerability in Netscape Communicator with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Netscape Communicator
Published: 1999-07-09
Last modified: 2026-06-16

Description

Netscape Communicator 4.x with Javascript enabled does not warn a user of cookie settings, even if they have selected the option to "Only accept cookies originating from the same server as the page being viewed".

Frequently asked questions

What is CVE-1999-0809?: Netscape Communicator 4.x with Javascript enabled does not warn a user of cookie settings, even if they have selected the option to "Only accept cookies originating from the same server as the page being viewed".
How severe is CVE-1999-0809?: CVE-1999-0809 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-1999-0809 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0809?: CVE-1999-0809 affects Netscape Communicator. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-0809?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-0809 published?: CVE-1999-0809 was published on 1999-07-09 and last updated on 2026-06-16.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/CVE-1999-0809

Affected products (1)

cpe:2.3:a:netscape:communicator:4.0:*:*:*:*:*:*:*

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